He's becoming more dependable. Sure, Janelle has to spell out a list of what she wants him to do, and there's always a chance that he won't get to everything every day. However, the days of him erasing or crossing out items on the list in the hopes that we won't notice he did so seem to have become a thing of the past. He is also getting better about the quality of the work that he is doing, to the point that we don't need to double check everything he's done (at least, not when he's still working on it). There's still room for improvement, but some people have said that about me too.
He's becoming more social. In the past year, we've gone from Trevor not inviting anyone over, to inviting over a friend, to inviting over a couple of friends, to going over to a friend's house (sometimes forgetting to let us know he set these events up until the day of). It's still a small group of people, but I like the expanding trend.
He's developing a clearer idea of what he likes to do. This year, I saw a change from Trevor wanting to do anything that I was doing to him deciding that there were some things he liked doing with me and others that he would prefer to avoid. While there is a bit of a sense of loss on my part, I like that he is developing a greater sense of independence.
In short, Trevor has been making the steps from being a boy to being a young man. I am tremendously proud of him.